:root {
  --bg: #ffffff;
  --text: #102033;
  --muted: #667085;
  --line: #e8edf3;
  --primary: #0b4f8a;
  --primary-2: #0ea5e9;
  --accent: #7c3aed;
  --dark: #07111f;
  --soft: #f5f8fc;
  --card: rgba(255, 255, 255, 0.92);
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 7vw;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.75);
}

.header-inner {
  width: min(1180px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin: 0 auto;
}

.brand {
  flex: 0 0 auto;
  font-size: 1.42rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #06162b;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(16px, 2vw, 26px);
  font-size: 1rem;
  font-weight: 600;
}

.nav a {
  position: relative;
  color: #182235;
  opacity: 0.88;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: var(--primary);
  opacity: 1;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  border-radius: 999px;
  background: var(--primary-2);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.nav a.active::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(3, 15, 32, 0.94), rgba(3, 26, 51, 0.72), rgba(3, 17, 31, 0.9)),
    radial-gradient(circle at 75% 40%, rgba(14, 165, 233, 0.35), transparent 32%),
    url("assets/figures/scene/scene.png"),
    linear-gradient(135deg, #0b172a 0%, #122c4a 48%, #07111f 100%);
  background-size: auto, auto, cover, auto;
  background-position: center, center, center, center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 92%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1120px, 88vw);
  text-align: center;
  color: white;
  padding-top: 24px;
  transform: translateY(-34px);
}

.announcement {
  display: inline-flex;
  align-items: center;
  padding: 15px 24px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.28);
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.06rem;
  font-weight: 600;
  margin-bottom: 34px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(4rem, 9vw, 7.8rem);
  line-height: 0.95;
  font-weight: 800;
  letter-spacing: -0.075em;
}

.hero-subtitle {
  max-width: 1180px;
  margin: 30px auto 0;
  font-size: clamp(1.22rem, 1.95vw, 1.52rem);
  line-height: 1.42;
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 1.02rem;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary-2), var(--primary));
  color: white;
  box-shadow: 0 16px 36px rgba(14, 165, 233, 0.28);
}

.btn.secondary {
  color: white;
  background: rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(12px);
}

.stats-card {
  margin: 42px auto 0;
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border-radius: 22px;
  background: rgba(4, 12, 24, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.stats-card div {
  padding: 26px 20px;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.stats-card div:last-child { border-right: none; }
.stats-card strong { display: block; font-size: 1.62rem; }
.stats-card span { display: block; margin-top: 8px; font-size: 0.96rem; color: rgba(255,255,255,.76); }

.section {
  padding: 96px 7vw;
}

.section > .section-title,
.section > .two-column,
.section > .feature-grid,
.section > .cards-3,
.section > .resource-row,
.section > .pipeline,
.section > .overview-figure,
.section > .overview-layout,
.section > .overview-card-grid,
.section > .dataset-visual-grid,
.section > .dataset-variable-row,
.section > .dataset-explain-wide,
.section > .dataset-tree-grid,
.section > .dataset-schema-block,
.section > .usage-panel,
.section > .dataset-layout,
.section > .publication-card,
.section > .timeline,
.section > .scenario-summary,
.section > .scenario-gallery,
.section > .scenario-table {
  width: min(100%, 1180px);
  margin-left: auto;
  margin-right: auto;
}

.section.light { background: var(--soft); }

.section-title {
  max-width: 920px;
  margin-bottom: 46px;
}
.section-title.centered { text-align: center; margin-left: auto; margin-right: auto; }
.section-title span {
  display: inline-block;
  margin-bottom: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  font-size: 0.78rem;
}

#scenarios .section-title span {
  font-size: 1.02rem;
}

#overview .section-title span {
  font-size: 1.02rem;
}

#dataset .section-title span {
  font-size: 1.02rem;
}

#overview .section-title {
  margin-bottom: 30px;
}

.section-title h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.two-column {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 52px;
  align-items: start;
}
.two-column p {
  font-size: 1.16rem;
  line-height: 1.9;
  color: var(--muted);
}
.two-column > div > p:first-child {
  margin-top: 0;
}

.feature-grid, .cards-3, .resource-row {
  display: grid;
  gap: 18px;
}
.feature-grid { grid-template-columns: repeat(2, 1fr); }
.cards-3, .resource-row { grid-template-columns: repeat(3, 1fr); }

.feature-card, .task-card, .resource-card, .publication-card, .dataset-notes, .code-block, .step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.06);
}
.feature-card, .task-card, .resource-card { padding: 28px; }
.feature-card h3, .task-card h3, .resource-card h3, .step h3, .dataset-notes h3 { margin: 0 0 10px; }
.feature-card p, .task-card p, .resource-card p, .step p, .dataset-notes p, .dataset-notes li { color: var(--muted); line-height: 1.7; }

.overview-section {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(14, 165, 233, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(14, 165, 233, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 48%, #f4f8fc 100%);
  background-size: auto, 44px 44px, 44px 44px;
}

.overview-figure {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  width: 100%;
}

.overview-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 26px;
  box-shadow: 0 24px 60px rgba(2, 28, 52, 0.26);
}

.overview-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: clamp(26px, 4vw, 50px);
  align-items: center;
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid rgba(215, 229, 251, 0.16);
  border-radius: 34px;
  background:
    linear-gradient(135deg, rgba(5, 18, 38, 0.98) 0%, rgba(8, 51, 85, 0.95) 55%, rgba(15, 118, 110, 0.9) 100%);
  box-shadow: 0 28px 76px rgba(15, 23, 42, 0.22);
  overflow: hidden;
}

.overview-layout::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(110deg, rgba(0, 0, 0, 0.8), transparent 66%);
  pointer-events: none;
}

.overview-lede {
  position: relative;
  z-index: 1;
}

.overview-lede p {
  margin: 0;
  max-width: 660px;
  color: rgba(226, 242, 255, 0.82);
  font-size: clamp(1rem, 1.12vw, 1.12rem);
  line-height: 1.82;
}

.overview-lede p + p {
  margin-top: 16px;
}

.overview-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.overview-facts div {
  padding: 16px 14px;
  border: 1px solid rgba(186, 230, 253, 0.2);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
}

.overview-facts strong {
  display: block;
  color: #ffffff;
  font-size: 1.36rem;
  line-height: 1;
}

.overview-facts span {
  display: block;
  margin-top: 8px;
  color: rgba(226, 242, 255, 0.72);
  font-size: 0.84rem;
  font-weight: 700;
}

.overview-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.overview-card {
  position: relative;
  padding: 28px;
  border: 1px solid rgba(215, 229, 251, 0.9);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 251, 255, 0.9));
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.overview-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, #0ea5e9, #14b8a6, #7c3aed);
}

.overview-card > span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: #e8f6ff;
  color: #0b4f8a;
  font-size: 0.86rem;
  font-weight: 900;
}

.overview-card h3 {
  margin: 18px 0 12px;
  color: #10233f;
  font-size: 1.18rem;
}

.overview-card ul {
  margin: 0;
  padding-left: 18px;
}

.overview-card li {
  color: var(--muted);
  line-height: 1.72;
}

.overview-card li + li {
  margin-top: 8px;
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.step { padding: 24px; position: relative; }
.step b { color: var(--primary-2); font-size: 0.88rem; }

.dataset-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: stretch;
}
.code-block {
  background: #f8fbff;
  color: #10233f;
  padding: 28px;
  overflow: auto;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
}
pre { margin: 0; font-size: 0.92rem; line-height: 1.75; white-space: pre-wrap; }
.dataset-notes { padding: 30px; }

.dataset-section {
  background:
    linear-gradient(180deg, #ffffff 0%, #f7fbff 52%, #ffffff 100%);
}

.dataset-subsection-title {
  width: min(100%, 1180px);
  margin: 34px auto 0;
}

.dataset-subsection-title h3 {
  margin: 0 0 12px;
  color: #10233f;
  font-size: clamp(1.65rem, 2.5vw, 2.15rem);
  line-height: 1.12;
}

.dataset-subsection-title p {
  max-width: 1180px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.25vw, 1.16rem);
  line-height: 1.78;
}

.dataset-visual-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.modality-card,
.format-panel,
.detail-panel,
.usage-panel {
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.modality-card {
  overflow: hidden;
}

.modality-preview {
  position: relative;
  min-height: 230px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #eef4ff;
}

.modality-preview::before {
  content: '';
  position: absolute;
  inset: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.55);
  border-radius: 18px;
}

.modality-preview span {
  position: relative;
  z-index: 1;
  padding: 8px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: #10233f;
  font-size: 1rem;
  font-weight: 800;
}

.preview-camera {
  background:
    linear-gradient(135deg, rgba(14, 165, 233, 0.82), rgba(11, 79, 138, 0.78)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.25) 8%, transparent 8% 16%, rgba(255, 255, 255, 0.25) 16% 24%, transparent 24%);
}

.preview-lidar {
  background:
    radial-gradient(circle at 48% 56%, rgba(255, 255, 255, 0.9) 1px, transparent 2px) 0 0 / 20px 20px,
    linear-gradient(135deg, #0f766e, #0ea5e9);
}

.preview-radar {
  background:
    repeating-radial-gradient(circle at 50% 58%, rgba(255, 255, 255, 0.42) 0 2px, transparent 2px 18px),
    linear-gradient(135deg, #155e75, #7c3aed);
}

.preview-gps {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(180deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(135deg, #0369a1, #16a34a);
}

.preview-channel {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.36) 1px, transparent 1px) 0 0 / 18px 18px,
    linear-gradient(180deg, rgba(255, 255, 255, 0.24) 1px, transparent 1px) 0 0 / 18px 18px,
    linear-gradient(135deg, #0b4f8a, #14b8a6);
}

.preview-beam {
  background:
    conic-gradient(from 210deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.12)),
    linear-gradient(135deg, #312e81, #0ea5e9);
}

.modality-card h3 {
  margin: 20px 24px 8px;
  color: #10233f;
  font-size: 1.28rem;
}

.modality-card p {
  min-height: 62px;
  margin: 0;
  padding: 0 24px 24px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.65;
}

.dataset-variable-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.dataset-variable-row article {
  padding: 20px 18px;
  border: 1px solid #dce8f4;
  border-radius: 18px;
  background:
    linear-gradient(180deg, #ffffff, #f8fbff);
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.06);
}

.dataset-variable-row strong {
  display: block;
  color: #10233f;
  font-size: 1.14rem;
}

.dataset-variable-row span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.45;
}

.dataset-sample-demo {
  width: min(100%, 1180px);
  margin: 24px auto 0;
  padding: 18px;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.09);
}

.dataset-sample-demo img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid #e5edf6;
}

.dataset-sample-demo figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
  text-align: center;
}

.dataset-sync-grid {
  width: min(100%, 1180px);
  margin: 24px auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.dataset-sync-grid article {
  overflow: hidden;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

.dataset-sync-grid img,
.dataset-sync-grid canvas {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  background: #f7fbff;
  border-bottom: 1px solid #e5edf6;
}

.dataset-sync-grid h3 {
  margin: 18px 22px 22px;
  color: #10233f;
  font-size: 1.24rem;
  text-align: center;
}

.dataset-sync-grid p {
  margin: 0 22px 22px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.55;
}

.dataset-metadata-demo {
  width: min(100%, 1180px);
  margin: 24px auto 0;
}

.dataset-metadata-demo img,
.dataset-metadata-demo canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px;
  border: 1px solid #dfe8f3;
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.dataset-format-grid,
.dataset-tree-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 34px;
  margin-top: 26px;
  align-items: stretch;
}

.dataset-explain-wide {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 34px;
}

.format-panel {
  overflow: hidden;
}

.directory-tree {
  padding: 28px;
  border-color: #dfe8f3;
  background: #ffffff;
  color: #10233f;
}

.directory-tree h3 {
  margin: 0 0 16px;
  color: #10233f;
  font-size: clamp(1.32rem, 1.75vw, 1.58rem);
}

.directory-tree pre {
  font-family: inherit;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.72;
}

.dataset-schema-block,
.usage-panel .code-block {
  background: #f8fbff;
  color: #10233f;
  border-color: #dfe8f3;
}

#dataset code,
#dataset pre {
  font-family: inherit;
}

#dataset code {
  font-weight: 400;
}

.dataset-explain {
  padding: 30px;
}

.dataset-explain h3,
.dataset-explain-wide h3,
.detail-panel h3,
.usage-panel h3 {
  margin: 0 0 12px;
  color: #10233f;
  font-size: 1.25rem;
}

.directory-intro h3 {
  margin: 0 0 14px;
  color: #10233f;
  font-size: clamp(1.65rem, 2.5vw, 2.15rem);
  line-height: 1.12;
}

.dataset-explain p,
.dataset-explain-wide p,
.usage-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.78;
}

.directory-intro p {
  max-width: 100%;
  font-size: clamp(1.05rem, 1.25vw, 1.16rem);
}

.format-note-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 0;
}

.format-note-grid div {
  padding: 18px 20px;
  border-radius: 16px;
  background: #f2f7fd;
  border: 1px solid #e0eaf5;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
}

.format-note-grid strong,
.format-note-grid span {
  display: block;
}

.format-note-grid strong {
  color: #0b4f8a;
  font-size: 1.08rem;
}

.format-note-grid span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.96rem;
}

.dataset-schema-block {
  margin-top: 0;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: #ffffff;
  color: #10233f;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
  padding: 30px;
  overflow: auto;
}

.dataset-schema-block h3 {
  margin: 0 0 12px;
  color: #10233f;
  font-size: clamp(1.42rem, 1.9vw, 1.72rem);
}

.dataset-schema-block > p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.75;
}

.schema-group {
  padding-top: 18px;
  border-top: 1px solid #e6edf5;
}

.schema-group + .schema-group {
  margin-top: 18px;
}

.schema-group h4 {
  margin: 0 0 10px;
  color: #20344d;
  font-size: 1.08rem;
}

.schema-group ul {
  margin: 0;
  padding-left: 18px;
}

.schema-group li {
  color: #485a72;
  font-size: 1rem;
  line-height: 1.72;
}

.schema-group li + li {
  margin-top: 7px;
}

.schema-group li span {
  display: inline-flex;
  margin: 0 6px;
  padding: 2px 7px;
  border-radius: 6px;
  background: #eef4ff;
  color: #17456f;
  font-size: 0.86rem;
  font-weight: 500;
}

.dataset-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.detail-panel {
  padding: 26px;
}

.field-list {
  margin: 0;
  padding-left: 18px;
}

.field-list li {
  color: var(--muted);
  line-height: 1.7;
}

.field-list li + li {
  margin-top: 9px;
}

code {
  padding: 0.1em 0.34em;
  border-radius: 6px;
  background: #eef4ff;
  color: #17456f;
  font-size: 0.92em;
}

pre code {
  padding: 0;
  border-radius: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
}

.usage-panel {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 26px;
  margin-top: 30px;
  padding: 30px;
  align-items: stretch;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(241, 248, 255, 0.95));
}

.usage-panel .code-block {
  border-radius: 18px;
  box-shadow: none;
  padding: 24px;
}

.usage-panel .python-code {
  background: #07111f;
  color: #dbeafe;
  border-color: rgba(148, 163, 184, 0.24);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.python-code pre,
.python-code code,
.python-code span {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.python-code pre {
  font-size: 0.96rem;
  font-weight: 400;
  line-height: 1.72;
}

.python-code .kw { color: #7dd3fc; }
.python-code .str { color: #bef264; }
.python-code .num { color: #fbbf24; }

.usage-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.usage-copy p {
  font-size: 1.04rem;
}

.usage-steps {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: usage-step;
}

.usage-steps li {
  counter-increment: usage-step;
  position: relative;
  padding: 14px 16px 14px 48px;
  border: 1px solid #dce8f4;
  border-radius: 15px;
  background: #ffffff;
  color: #43546b;
  font-size: 1rem;
  line-height: 1.5;
}

.usage-steps li::before {
  content: counter(usage-step);
  position: absolute;
  left: 15px;
  top: 13px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #e8f6ff;
  color: #0b4f8a;
  font-size: 0.82rem;
  font-weight: 900;
}

.resource-card:hover, .feature-card:hover, .task-card:hover {
  transform: translateY(-3px);
  transition: 0.2s ease;
  box-shadow: var(--shadow);
}

.tutorial-section {
  background:
    linear-gradient(180deg, #f6f9fd 0%, #ffffff 44%, #f7fbff 100%);
}

#tutorials .section-title {
  max-width: 1180px;
}

#tutorials .section-title span {
  font-size: 1.02rem;
}

#code .section-title span {
  font-size: 1.02rem;
}

#publications .section-title span {
  font-size: 1.02rem;
}

#download .section-title span {
  font-size: 1.02rem;
}

#tutorials .section-title h2 {
  white-space: nowrap;
}

.tutorial-workflow,
.module-grid,
.codebase-layout,
.tutorial-run-grid,
.tutorial-value,
.tutorial-subsection {
  width: min(100%, 1180px);
  margin-left: auto;
  margin-right: auto;
}

.tutorial-workflow {
  margin-top: 34px;
}

.module-grid article,
.codebase-tree,
.codebase-details article,
.run-panel,
.tutorial-value {
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.tutorial-workflow h3,
.module-grid h4,
.run-panel h3,
.tutorial-value h3,
.tutorial-subsection h3 {
  margin: 0 0 12px;
  color: #10233f;
}

.tutorial-workflow p,
.module-grid p,
.run-panel li,
.tutorial-value p,
.tutorial-subsection p {
  color: var(--muted);
  line-height: 1.72;
}

.tutorial-workflow p,
.module-grid p,
.tutorial-value p,
.tutorial-subsection p {
  margin: 0;
}

.tutorial-workflow h3 {
  font-size: clamp(1.65rem, 2.5vw, 2.15rem);
  line-height: 1.12;
}

.tutorial-workflow p {
  max-width: 1180px;
  font-size: clamp(1.05rem, 1.25vw, 1.16rem);
  line-height: 1.78;
}

.workflow-figure {
  width: 100%;
  max-width: 1180px;
  margin: 24px auto 0;
  border: 1px solid #dfe8f3;
  border-radius: 18px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.workflow-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.tutorial-subsection {
  margin-top: 44px;
}

.tutorial-subsection h3 {
  margin-top: 0;
  font-size: clamp(1.65rem, 2.5vw, 2.15rem);
}

.tutorial-subsection p {
  max-width: 1180px;
  font-size: clamp(1.04rem, 1.2vw, 1.14rem);
}

.codebase-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.48fr) minmax(0, 1.52fr);
  gap: 28px;
  margin-top: 24px;
  align-items: start;
  padding: 28px;
  border: 1px solid #dfe8f3;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.codebase-tree {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.codebase-tree h4 {
  margin: 0 0 16px;
  color: #10233f;
  font-size: 1.22rem;
}

.codebase-tree pre {
  margin: 0;
  color: #24364b;
  font-family: inherit;
  font-size: 0.98rem;
  line-height: 1.72;
  white-space: pre-wrap;
}

.codebase-details {
  display: grid;
  gap: 14px;
  font-size: 0.94rem;
}

.codebase-details article {
  padding: 20px 22px;
  box-shadow: none;
}

.codebase-details h4 {
  margin: 0 0 8px;
  color: #10233f;
  font-size: 1.08rem;
}

.codebase-details p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.codebase-details ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.codebase-details li {
  margin: 8px 0;
  line-height: 1.68;
}

.file-name {
  color: #17456f;
  font-weight: 600;
  display: inline-block;
  padding: 2px 7px;
  border-radius: 7px;
  background: #eaf4ff;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 22px;
}

.module-grid article {
  padding: 24px;
}

.module-grid h4 {
  margin-top: 0;
  font-size: 1.15rem;
}

.tutorial-run-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 24px;
  margin-top: 30px;
  align-items: stretch;
}

.run-panel {
  padding: 28px;
}

.run-panel h3 {
  margin-top: 0;
  font-size: 1.35rem;
}

.run-panel ol,
.run-panel ul {
  margin: 0;
  padding-left: 20px;
}

.run-panel li + li {
  margin-top: 10px;
}

.tutorial-code {
  background: #07111f;
  color: #dbeafe;
  border-color: rgba(148, 163, 184, 0.24);
  border-radius: 22px;
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.16);
}

.tutorial-command-block {
  width: min(100%, 1180px);
  margin: 22px auto 0;
}

.tutorial-method {
  width: min(100%, 1180px);
  margin: 26px auto 0;
  padding: 30px;
  border: 1px solid #dfe8f3;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.tutorial-method + .tutorial-method {
  margin-top: 28px;
}

.tutorial-method-heading span {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  background: #e8f6ff;
  color: #0b5ea8;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tutorial-method-heading h4 {
  margin: 12px 0 8px;
  color: #10233f;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
}

.tutorial-method-heading p {
  max-width: 920px;
  margin: 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.72;
}

.tutorial-method .tutorial-command-block {
  width: 100%;
}

.web-interface-instruction {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 4px solid #0ea5e9;
  border-radius: 0 12px 12px 0;
  background: #eef8ff;
  color: #334b66;
  line-height: 1.65;
}

.web-interface-instruction a {
  color: #0b5ea8;
  font-weight: 700;
}

.web-interface-figure {
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid #dfe8f3;
  border-radius: 18px;
  background: #f8fbff;
}

.web-interface-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.web-interface-figure figcaption {
  padding: 14px 18px 16px;
  color: #607086;
  font-size: 0.92rem;
  line-height: 1.55;
}

.tutorial-code pre,
.tutorial-code code,
.tutorial-code span {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.tutorial-code pre {
  font-size: 0.96rem;
  line-height: 1.72;
}

.tutorial-code .comment {
  color: #93c5fd;
}

.tutorial-value {
  margin-top: 30px;
  padding: 30px;
  background:
    linear-gradient(135deg, #ffffff, #f1f8ff);
}

.tutorial-value h3 {
  margin-top: 0;
  font-size: 1.35rem;
}

.code-link-panel {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 34px 38px;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: #ffffff;
  text-align: center;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.code-link-panel a {
  color: #0b5ea8;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-weight: 800;
}

.code-link-panel p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.publication-placeholder,
.download-placeholder {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 34px 38px;
  border: 1px solid #dfe8f3;
  border-radius: 22px;
  background: #ffffff;
  text-align: center;
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.07);
}

.publication-placeholder p {
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.download-button {
  min-width: 220px;
  border-color: transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(14, 165, 233, 0.32);
}

.download-button:focus-visible {
  outline: 3px solid rgba(14, 165, 233, 0.28);
  outline-offset: 4px;
}

.publication-card { padding: 32px; }
.publication-card h3 { margin-top: 0; font-size: 1.35rem; }
.authors, .venue { color: var(--muted); }
.publication-card pre {
  margin-top: 24px;
  padding: 22px;
  border-radius: 16px;
  background: #f8fbff;
  color: #10233f;
  border: 1px solid #dfe8f3;
  overflow: auto;
}

.timeline {
  border-left: 3px solid var(--line);
  padding-left: 28px;
}
.timeline div { margin-bottom: 24px; }
.timeline time { font-weight: 800; color: var(--primary); }
.timeline p { margin: 6px 0 0; color: var(--muted); }

.footer {
  padding: 64px 7vw;
  background: #07111f;
  color: white;
  text-align: center;
}
.footer h2 { margin: 0 0 10px; font-size: 2rem; letter-spacing: -0.05em; }
.footer p { color: rgba(255,255,255,.72); }
.footer .small { font-size: 0.86rem; }

@media (max-width: 980px) {
  .site-header { padding: 0 5vw; }
  .header-inner { gap: 20px; }
  .nav {
    gap: 14px;
    overflow-x: auto;
    max-width: 68vw;
    padding-bottom: 2px;
    white-space: nowrap;
  }
  .stats-card, .feature-grid, .cards-3, .resource-row, .pipeline, .two-column, .overview-layout, .overview-card-grid, .dataset-format-grid, .dataset-tree-grid, .dataset-explain-wide, .dataset-detail-grid, .usage-panel, .dataset-layout, .tutorial-run-grid, .codebase-layout {
    grid-template-columns: 1fr;
  }
  .dataset-variable-row { grid-template-columns: repeat(2, 1fr); }
  .stats-card div { border-right: none; border-bottom: 1px solid rgba(255,255,255,.1); }
  .hero { min-height: 860px; }
  .overview-layout { padding: 30px; }
  .overview-facts { grid-template-columns: 1fr; }
}
.section-intro {
  max-width: 1120px;
  margin: 14px auto 0;
  color: #5b6472;
  line-height: 1.62;
  font-size: clamp(1.06rem, 1.35vw, 1.24rem);
}

.scenario-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 1.6vw, 18px);
  margin: 36px 0 42px;
}

.scenario-summary.split-summary {
  margin-top: -20px;
}

.summary-card {
  background: #ffffff;
  border: 1px solid #e6ebf2;
  border-radius: 16px;
  padding: clamp(18px, 2.1vw, 24px) clamp(14px, 1.8vw, 18px);
  text-align: center;
  box-shadow: 0 8px 24px rgba(20, 38, 63, 0.05);
}

.summary-card strong {
  display: block;
  font-size: clamp(1.45rem, 2vw, 1.8rem);
  font-weight: 800;
  color: #10233f;
  margin-bottom: 8px;
}

.summary-card span {
  color: #667085;
  font-size: 0.95rem;
}

.scenario-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 22px);
  margin-bottom: 34px;
}

.gallery-card {
  background: #ffffff;
  border: 1px solid #e6ebf2;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(20, 38, 63, 0.06);
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  display: block;
  background: #f5f7fa;
  transition: transform 0.28s ease, filter 0.28s ease;
  cursor: zoom-in;
}

.gallery-card:hover img {
  transform: scale(1.045);
  filter: saturate(1.08) contrast(1.03);
}

.gallery-card:active img {
  transform: scale(1.08);
}

.gallery-info {
  padding: clamp(15px, 1.8vw, 18px) clamp(14px, 1.8vw, 18px) clamp(17px, 2vw, 20px);
  text-align: center;
}

.gallery-info h3 {
  margin-bottom: 8px;
  font-size: clamp(1rem, 1.15vw, 1.1rem);
  color: #10233f;
}

.gallery-info p {
  color: #5b6472;
  line-height: 1.7;
  margin-bottom: 14px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef4ff;
  color: #2656a8;
  font-size: 0.84rem;
  font-weight: 600;
}

.subsection-title {
  margin-bottom: 18px;
  font-size: 1.2rem;
  color: #10233f;
  text-align: center;
}

.scenario-table {
  margin-top: 14px;
  overflow-x: auto;
  max-height: 620px;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(20, 38, 63, 0.05);
}

.scenario-table table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
  overflow: hidden;
}

.scenario-table th,
.scenario-table td {
  padding: clamp(10px, 1.2vw, 14px) clamp(12px, 1.4vw, 16px);
  border-bottom: 1px solid #edf1f7;
  text-align: left;
  font-size: clamp(0.84rem, 0.95vw, 0.95rem);
}

.scenario-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f7f9fc;
  color: #10233f;
  font-weight: 700;
}

.scenario-table td {
  color: #596273;
}

.scenario-table tbody tr.test-row {
  background: #fffaf0;
}

.table-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
}

.category-single {
  background: #eef4ff;
  color: #2656a8;
}

.category-dynamic {
  background: #ecfdf3;
  color: #087443;
}

.category-nlos {
  background: #fff1f2;
  color: #b42318;
}

.split-train {
  background: #f2f4f7;
  color: #344054;
}

.split-test {
  background: #fff3d6;
  color: #9a5b00;
}

@media (max-width: 1024px) {
  .module-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .dataset-detail-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .scenario-summary,
  .scenario-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 700px) {
  .site-header {
    height: auto;
    min-height: 72px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .nav {
    width: 100%;
    max-width: 100%;
  }

  .hero-content {
    padding-top: 132px;
    transform: translateY(-18px);
  }

  .hero h1 {
    font-size: clamp(3rem, 17vw, 4.2rem);
  }

  #tutorials .section-title h2 {
    white-space: normal;
  }

  .tutorial-method {
    padding: 20px;
    border-radius: 18px;
  }

  .web-interface-figure {
    border-radius: 14px;
  }

  .scenario-summary,
  .scenario-gallery,
  .dataset-visual-grid,
  .dataset-detail-grid,
  .dataset-variable-row,
  .format-note-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .gallery-card img { aspect-ratio: 16 / 9; }
}

#scenarios {
  overflow-x: auto;
}

#scenarios .section-title,
#scenarios .scenario-summary,
#scenarios .scenario-gallery,
#scenarios .scenario-table {
  width: 1180px;
  max-width: none;
}

#scenarios .scenario-summary,
#scenarios .scenario-gallery {
  grid-template-columns: repeat(3, 1fr);
}